# odd positioning in tikz [closed]

I wonder why the letter k is not in the expected place, and why the path to sigma is oddly positioned. what's going on :)

\documentclass{article}
\usepackage{tikz}
\tikzset{
nat/.style     = {fill=white,draw,circle,minimum size=0.5cm,inner sep=1pt},
}
\begin{document}

\tikzset{
nat/.style     = {fill=white,draw,circle,minimum size=0.5cm,inner sep=1pt},
}
\begin{tikzpicture}
\draw (1,4) -- (1,3)
node[pos=1,nat] (s) {$\sigma$};
node[pos=0,nat,above] {$k$};
\draw (2,0) node[below] {$l$} to[out=90, in=-90] (s);
\draw (3,0) -- (3,4)
node[pos=0,below] {$x$}
node[pos=0.8,nat] (a) {$a$}
node[pos=1,above] {$x$};
\draw (1,0) node[below] {$m$} to[bend left] (a);
\end{tikzpicture}
\end{document}

## closed as off-topic by CarLaTeX, percusse, Stefan Pinnow, Torbjørn T., TeXnicianJun 19 '17 at 8:31

• This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• There is a semicolon after {$\sigma$} – Raoul Kessels Jun 19 '17 at 6:40
• damn semi colon !! that's what happens when you use too much haskell / ocaml and co ! :) thank you – nicolas Jun 19 '17 at 7:23
• I'm voting to close this question as off-topic because the error was due to a typo as shown in comments. – CarLaTeX Jun 19 '17 at 7:30
• justo. non sarà molto utile per altri – nicolas Jun 19 '17 at 7:34